Torque Transmission Device

Abstract

The invention relates to a torque transmission device ( 1 ) for the drive train of a motor vehicle, comprising an input element ( 2 ) and a cover element ( 16 ) which is connected to the input element ( 2 ) for conjoint rotation, and comprising an output element ( 3 ), wherein: the output element ( 3 ) and the input element ( 2 ) are rotatable in relation to one another via an energy accumulator device ( 4 ) and about a common axis of rotation A; a torque-limiting device ( 10 ) is located between the input element ( 2 ) and the output element ( 3 ); the torque-limiting device ( 10 ) is designed to transmit a torque between the input element ( 2 ) and the output element ( 3 ) up to a limit torque value and, when the limit torque value is exceeded, to transmit a torque at least in part or to transmit no torque at all; the torque-limiting device ( 10 ) is connected to the energy accumulator device ( 4 ) via a frictional and/or form-fitting connection ( 8 ), is connected to the input element ( 2 ) via a first frictional connection ( 9 ), and is connected to the cover element ( 16 ) via a second frictional connection ( 14 ); the torque-limiting device ( 10 ) comprises a preload element ( 5 ) for providing the frictional connections ( 9; 14 ); the preload element ( 5 ) is preloaded between the input element ( 2 ) and the cover element ( 16 ); a radially inner region of the preload element ( 5 ) is provided with at least two contact elements ( 17 a , 17 b , 17 c , 17 d , 17 e , 17 f ); the contact elements ( 17 a , 17 b , 17 c , 17 d , 17 e , 17 f ) are provided on a radius (r) and protrude axially out of the preload element ( 5 ) in the direction of the input element ( 2 ); the contact elements ( 17 a , 17 b , 17 c , 17 d , 17 e , 17 f ) are at an angular distance (α) from one another; and the contact elements ( 17 a , 17 b , 17 c , 17 d , 17 e , 17 f ) form the first frictional connection with the input element ( 2 ).

1 .- 5 . (canceled) 
     
     
         6 . A torque transmission device for a drive train of a motor vehicle, comprising:
 an input element;   an output element;   a cover element connected in a rotationally conjoint manner to the input element, as well as the output element;   an energy storage device via which the output element and the input element are rotatable relative to one another about a joint axis of rotation A;   a torque-limiting device is arranged between the input element and the output element, and configured to transmit a torque between the input element and the output element up to a torque threshold value and, when the torque threshold value being exceeded, to transmit at least partially a torque or completely no torque;   a frictional and/or positive-locking connection via which the torque-limiting device is connected to the energy storage device;   a first frictionally engaged connection via which the torque-limiting device is connected to the input element; and   a second frictionally engaged connection via which the torque-limiting device is connected to the cover element;   wherein the torque-limiting device comprises a pretensioning element configured to provide the first and second frictionally engaged connections, wherein the pretensioning element is pretensioned between the input element and the cover element,   wherein the pretensioning element on a radially inner region has at least two contact elements,   wherein the at least two contact elements are provided on a radius and project axially in a direction of the input element from the pretensioning element, and   wherein the at least two contact elements are provided with an angular distance to one another and wherein the at least two contact elements form the first frictionally engaged connection with the input element.   
     
     
         7 . The torque transmission device as claimed in  claim 6 , wherein the at least two contact elements are formed from the pretensioned element and/or are provided as additional elements to the pretensioning element. 
     
     
         8 . The torque transmission device as claimed in  claim 6 , wherein the axial pretensioning element provides a radial centering surface radially on an inside and wherein the input element provides at least three corresponding radial bearing elements distributed evenly over a circumference. 
     
     
         9 . The torque transmission device as claimed in  claim 8 , wherein the radial bearing elements are formed from the input element and/or are attached as additional elements to the input element. 
     
     
         10 . A method for producing a torque transmission device, for a drive train of a motor vehicle, comprising:
 providing an input element;   providing an output element;   providing an energy storage device;   providing a torque-limiting device, wherein the torque-limiting device is configured, below a torque value, to transmit a torque between input element and output element and, above the torque value, to at least partially transmit no torque;   providing a cover element;   arranging the input element and the output element rotatably relative to one another via the energy storage device and about a joint axis of rotation A;   arranging the torque-limiting device between the input element and the output element, wherein the torque-limiting device is formed, below a torque value, to transmit a torque between input element and output element and, above the torque value, to at least partially transmit no torque; and   arranging the cover element so that the torque-limiting device is clamped between the input element and the cover element with a defined clamping force;   wherein in presence of the defined clamping force, the cover element is connected in a rotationally conjoint and axially fixed manner to the input element so that the torque-limiting device transmits the torque between the input element and the output element up to a threshold torque and, in event of the threshold torque being exceeded, only partially or even no torque is transmitted.